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SubjectRe: [PATCH v22 00/24] Intel SGX foundations
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On 9/14/19 6:41 AM, Jarkko Sakkinen wrote:
>
> The proposed LSM hooks give the granularity to make yes/no decision
> based on the
>
> * The origin of the source of the source for the enclave.
> * The requested permissions for the added or mapped peage.
>
> The hooks to do these checks are provided for mmap() and EADD
> operations.
>
> With just file permissions you can still limit mmap() by having a
> privileged process to build the enclaves and pass the file descriptor
> to the enclave user who can mmap() the enclave within the constraints
> set by the enclave pages (their permissions refine the roof that you
> can mmap() any memory range within an enclave).

The LSM hooks are presumably fixing a problem that these patches
introduce. What's that problem?

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